Spray gun



FIG. 1 is a right side elevational view of a spray gun showing my newdesign, the left side being a mirror image of the right side shown;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The ornamental design for a spray gun, as shown and described.